n | a(n) |
---|---|
1 | 4 |
2 | 10 |
3 | 40 |
4 | 139 |
5 | 568 |
6 | 2134 |
7 | 8724 |
8 | 33639 |
9 | 136904 |
10 | 534276 |
11 | 2166472 |
12 | 8510509 |
13 | 34420568 |
14 | 135769884 |
15 | 548080716 |
16 | 2167856618 |
17 | 8738893896 |
18 | 34633415528 |
19 | 139459394648 |
20 | 553500106331 |
21 | 2226881681120 |
22 | 8848085247670 |
23 | 35573691960864 |
24 | 141468339347027 |
[4,10,40,139,568,2134,8724,33639,136904,534276, 2166472,8510509,34420568,135769884,548080716, 2167856618,8738893896,34633415528,139459394648, 553500106331,2226881681120,8848085247670, 35573691960864,141468339347027] |